Secrets of the Earth

Season 1

2013 · 9 episodes · 3h 9m in all

Episodes

1. 1

   1. Rain

   23 May 2013 · 21 min

   Raindrops aren't only formed from condensed water vapor; some result from micrometeorites, and others deliver bacteria from the upper atmosphere.

2. 2

   2. Tsunamis

   23 May 2013 · 21 min

   Tsunamis form in the open ocean before making toward land. Science seeks not only to understand these giant waves but also predict them.

3. 3

   3. Gravity

   13 Jun 2013 · 21 min

   Earthquakes can actually affect Earth's gravity, and the ability of scientists to map gravitational fiels has uncovered mysterious anomalies.

4. 4

   4. Goldilocks

   20 Jun 2013 · 21 min

   Earth's distance from the sun is just right to sustain life, with neighbors Venus and Mars illustrating the impact of a slight difference in location.

5. 5

   5. Magnetic Shield

   27 Jun 2013 · 21 min

   A metallic core at the center of the Earth turns the planet into a magnet, generating a field that protects life on the surface from cosmic radiation.

6. 6

   6. Blizzards

   4 Jul 2013 · 21 min

   A visit to the researchers at a Colorado storm lab and an examination of lake-effect snow in northern New York reveal the science of blizzards.

7. 7

   7. Tides

   18 Jul 2013 · 21 min

   Water levels rise up to 50 feet at high tide in Canada's Bay of Fundy, while the Turnagain Arm in Alaska experiences 10-foot-high tidal "bore waves."

8. 8

   8. Volcanoes

   25 Jul 2013 · 21 min

   As evidenced by the 1815 eruption of Indonesia Mt. Tambora, volcanoes can profoundly impact the weather, producing lightning, ash and acid rain.

9. 9

   9. Strangest Places

   1 Aug 2013 · 21 min

   The world's most astonishing sites include extreme underwater ecosystems, steamy subterranean worlds and stratling igneous formations of lava rock.